• Title/Summary/Keyword: Electronic chart

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펜던트형 감성조명 LED 등기구 모듈개발

  • Seo, Dong-Won;Kim, Yeong-Geun;Kim, Jin-Sa;Kim, Geum-Taek;Choe, Un-Sik;Song, Min-Jong;Song, Myeong-Hyeon;Park, Chun-Bae
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.11a
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    • pp.264-264
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    • 2009
  • The sensitivity lighting of pendant type used Micro-controller AVR, embodiment method for Munsell chromaticity diagram system and adoption method for light source lens respectively. About a plan design of light fixture, LED circuit designed flow chart of circuits and LED driver of organizations in electron device. For used Solidworks soft ware program, LED light source must take a heat shink part and LED light fixture module for sensitivity lighting of pendant type into considerations

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Fabrications and Properties of Ferroxplana/Rubber Composite for Electromagnetic wave Absorbers (Ferroxplana/Rubher 복합형 전파흡수체의 제작 및 특성)

  • 박상하;사공건
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1993.11a
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    • pp.71-74
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    • 1993
  • In this paper, the permeability(${\mu}$$\sub$r′/, ${\mu}$$\sub$r"/), permittivity($\varepsilon$$\sub$r′/, $\varepsilon$$\sub$r"/) and absorption properties of Ferroxplana/Rubber composites were investigated. The composite specimens were prepared by molding and curing the mixtures of matrix rubber and Ni$_2$Y ferroxplana powders which were synthesized by coprecipitated method. The permeability(${\mu}$$\sub$r′/) of specimen was decreased in the range of 8∼12.5(GHz) and the permeability(${\mu}$$\sub$r"/) and Permittivity($\varepsilon$$\sub$r′/, $\varepsilon$$\sub$r"/) were increased. The optimum thickness of electromagnetic wave absorber (F/R=4, 1,200($^{\circ}C$) ), utilizing the Smith chart, was about 3.0(mm). The Figure of Merit was 93(%).

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Real time monitoring of plasma processing equipment using optical emission spectroscopy and neural network (광반사분광기와 신경망을 이용한 플라즈마 공정장비의 실시간 감시)

  • Kim, Dae-Hyun;Kim, Byung-Whan
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.06a
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    • pp.369-369
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    • 2010
  • 소자제조 공정의 질과 생산성을 향상시키기 위하여 플라즈마 감시가 필요하다. 본 연구에서는 광반사분광기(Optical Emission Spectroscopy)를 이용하여 소스전력의 변화에 따른 플라즈마 상태 데이터를 수집하였다. 수집된 데이터를 이용한 시계열 신경망 감시 모델을 개발하였으며, 개발된 모델과 CUSUM(Cumulative Sum Control Chart)를 결합하여 플라즈마의 이상 상태를 실시간으로 감시하는 기법을 개발하였다. 매우 우수한 감시 성능을 확인할 수 있었다.

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A study on utilizing electronic nautical charts for building a optimum marine transportation system (최적 해양물류시스템 구축을 위한 전자해도 활용에 관한 연구)

  • 김계현;최훈성;원대희
    • Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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    • 2003.04a
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    • pp.313-321
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    • 2003
  • 우리나라의 연간 물동량 중 선박에 의한 물동량이 약 90% 이상을 차지하고 있으나 이러한 선박에 의한 막대한 물동량을 효율적으로 처리하기 위한 해양물류시스템의 구축이 미진한 상태이다. 이를 위해 국가에서는 항만의 물류시설을 확충하는 등 물리적인 대안을 가지고 시설 부족에 대한 대비를 하고 있다. 그러나 해양물류시스템에 있어서 또 다른 중요한 문제점은 각 선사별, 물류회사별로 공통업무에 대해 각기 다른 시스템과 데이터베이스를 운영함에 있다는 것이다. 이와 같은 독립적 시스템의 운영은 동일 업무에 대한 중복투자를 유발하게 되어 많은 시간 및 비용을 소요하게 되며, 원활한 정보교환에 걸림돌이 되고 있다. 따라서 본 연구에서는 국제적인 표준안이 마련되어 있는 전자해도(ENC, Electronic Nautical Chart)를 이용하여 클라이언트-서버 방식의 관리자용 선박 및 화물 위치검색시스템을 구현하였으며, 추후 다른 항만에서도 사용이 가능하여 독립적 시스템의 운영으로 인한 중복투자를 방지 할 수 있는 방안을 제시하였다. 아울러 전자해도의 새로운 활용 방안이 없는 현 시점에서 전자해도를 선박 및 화물 위치검색시스템의 위치 표시를 위한 도형 데이터베이스로 사용하여 전자해도 본연의 목적 이외에도 활용될 수 있는 실례를 제시함으로써 전자해도의 새로운 활용 가능성을 제시하였다.

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In-Line Automated Inspection System for Quality Improvement of Electronic Parts (전자부품의 품질향상을 위한 인라인 자동검사시스템)

  • Jung, Won;Chung, Yun Koo
    • Journal of Korean Society for Quality Management
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    • v.23 no.3
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    • pp.33-44
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    • 1995
  • This paper presents an automated visual inspection system for the electronic parts manufacturing process. In this system, a statistical process control (SPC) method is integrated into the automated inspection method on a real time base. It shows how the collected data can be analyzed with the SPC to provide process information. Also presented are studies of subpixel image processing technology to improve the accuracy of parts measurements, and the cumulative-sum (CUSUM) control chart for fraction defectives. An application of the developed system to connector manufacturing process as a part of computer integrated manufacturing (CIM) is presented.

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The Characteristics of Computer-Generated Holographic Optical Low-Pass Filter (컴퓨터로 설계한 홀로그램 광 저대역 필터의 특성 분석)

  • 김인길;고춘수;임성우;오용호;이재철
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.16 no.12S
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    • pp.1261-1267
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    • 2003
  • Since the grating optical low-pass fillet degrades the resolution of images, we developed a hologram optical low-pass filter that show low degradation of the image and studied its characteristics. We designed the hologram that divides input beam into circular shaped 21 beams with a Monte-Carlo based hologram generation program and calculated its MTE characteristics to compare it with that of a grating filter. The hologram was manufactured through the optical lithography process and attached to a digital imaging device (Zoran 732212) for measurement. The moirfiltering is compared with zone plate images and the resolution loss is measured with USAF resolution chart. The hologram optical low-pass filter showed better characteristics in both moly filtering and resolution.

Development and Evaluation of LED Lamp with Rectangular Light Distribution for Growth of Plant (식물성장용 사각배광 LED 조명 개발 및 평가)

  • Yun, Jung-Hyun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.2
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    • pp.126-131
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    • 2014
  • In this paper, plant crops used in the region to grow crops for the LED lighting area of a rectangle to fit the light distribution to maximize the efficiency of a rectangular distribution was made of LED lights. After the fabrication of LED lamps, light distribution, and in the area of $1.2m{\times}3m$ was the analysis of Illuminance chart. As a result of examining the performance light distribution for total Emin/Eav is 56%, and the target area of the light distribution compared to normal lamps Emin/Eav is improved by about 17%. In addition, plants grown in the area to minimize the outgoing light distribution can be focused on the cultivation area, according to the distance of the plants and be able to have the best luminous efficacy is judged.

The case study for Implementation and verification of Network based on VLSM (VLSM 기반의 네트워크 구현과 검증 사례연구)

  • Jang, Jae-Yeol;Kim, No-Whan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.11
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    • pp.1267-1276
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    • 2014
  • As the volume of internet rapidly increases, the number of IPv4 addresses available is quickly declining, while transition to IPv6 is being delayed. As a interim solution, Variable-Length Subnet Masking(VLSM) addressing scheme, which varies the length of each IP address allowing more efficient, is being used. This paper suggests effective example of network based on virtual network with topology designed using VLSM charting rather than usual theoretical approach in VLSM, which allows more efficient use of address space.

Optimal Process Design of Super Junction MOSFET (Super Juction MOSFET의 공정 설계 최적화에 관한 연구)

  • Kang, Ey Goo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.8
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    • pp.501-504
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    • 2014
  • This paper was developed and described core-process to implement low on resistance which was the most important characteristics of SJ (super junction) MOSFET. Firstly, using process-simulation, SJ MOSFET optimal structure was set and developed its process flow chart by repeated simulation. Following process flow, gate level process was performed. And source and drain level process was similar to genral planar MOSFET, so the process was the same as the general planar MOSFET. And then to develop deep trench process which was main process of the whole process, after finishing photo mask process, we developed deep trench process. We expected that developed process was necessary to develop SJ MOSFET for automobile semiconductor.

A Graphical Design Method for an Optimum Low-Noise Amplifier (최적의 성능을 위한 저잡음 증폭기의 도식적 설계기법)

  • Han, Sok-Kyun;Choi, Byung-Ha
    • Journal of Advanced Navigation Technology
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    • v.6 no.4
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    • pp.312-317
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    • 2002
  • This paper presents a graphical design method for a low noise amplifier using the match circles plotted in the ${\Gamma}_{IN}$ plane on the smith chart. Each circle would be useful for reducing some trial and error efforts resulting from making a trade-off for an optimized performance of a single stage amplifier. A design example is presented to illustrate the design procedure.

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